Dental swaging device.



,PATENTED JULY 24, 1 9o6.

a. J. WEBER. DENTAL SWAGING DEVICE.

APPLICATION FILED SEPT. 21. 1905 inn:

' akto mg UNITED STALFELSW PArENr oriu'oE.

DENTAL SWAGING DEVICE.

Specification of Letters Patent.

Patented July 24:, 1906.

Application filed September 21,1905. Serial No. 279,439.

To all whom it may concern.-

Be it known that I, GEORGE J. WEBER, a citizen of the United States,residing at Liberty Center, in the county of Henry and State of Ohio,have invented new and useful Improvements in Dental Swaging Devices, of

. which the following is a specification.

This invention relates to improvements in dental swaging devicesdesigned for metal dental plate, cusp, and similar work.

The object of the invention is to provide a swaging device which issimple of construc tion, durable and efficient in use, and comparativelyinexpensive of production and which reduces the number of partscustomarily employed and simplifies the operation of swaging dentalelements of the stated character.

In the drawings hereto annexed and forming a part of this specification,Figure 1 is a side elevation of the swaging device with the plungerinverted from its normal position to receive the die, the latter beingapplied thereto. Fig. 2 is a central vertical section of the same,showing the parts as they appear in the act of swaging a plate. Fig. 3is a top plan view of the plunger and die as they appear in Fig. 1. Fig.1 is a side view of the plunger per 86.

In carrying my invention into practice I provide a cup or receptacle 1of suitable size for the purpose and preferably made of steel. In thebottom of this cup is placed an anvilbody or work-backing 2, composed ofparaffin, soft rubber, or some other suitable plastic or semiplasticmaterial.

A plunger 3 is provided to fit within the cup and is preferably made ofhard wood or some other preferred material which is inexpensive and atthe same time prevents, to a arge extent, the noise produced in theoperation of hammering when a metallic plunger is employed. The body ofthe plunger corresponds cross-sectionally in form to the crosssectionalcontour of the chamber of the cup 1 and is recessed at its upper andlower ends to receive metallic bands 4 and 5, which providewear-surfaces to contact with the cup and reinforce the wooden plungerto prevent all liability of the same splitting under the blows from ahammer or pressure from a press. The bands are countersunk in therecesses to lie flush with the outer surface of the plunger, and theband 5 projects below the bottom surface of the plunger to form ashallow recess or receptacle for a die-backing 6, composed of wax orsome other suitable material which is hard under normal temperpture andsoftens under the application of wet.

The die 7 may be of any suitable construction adapted for plate or cuspwork and is adapted in use to rest against the backing 6. In applyingthe die to the backing the latter is softened by heat and the rear faceof the die seated thereon and embedded therein, so that the backing willhold the die removably in operative position.

The upper end of the plunger may be provided with a reducedconcussion-head 8 to receive the blows from a hammer or mallet or may besquared or rendered plane-surfaced for the effective bearing of thefollower of a screw-press thereon when a press is employed to producepressure in the swaging operation. Either end of the plunger is adaptedto be fitted in the cup, the plunger thus be ing rendered reversible, sothat it may be supported in inverted position for the ready applicationof the die thereto and then insorted with the die-carrying end downwardfor swaging.

In operation the plunger is inverted and supported in the cup in theposition shown in Fig. 1, and while in this positionthe die is appliedthereto in the manner previously described. The plate to be swaged isthen placed upon the die and the plunger lifted out of the cup and thelatter inverted and placed over the bottom ordie-carrying end of theplunger. The complete swaging device is then reversed to the positionshown in Fig. 2 and rested upon a swaging-block and a hammer or malletemployed on the concussion-head 8 to force the plunger downward underthe blows thereon and effect the swaging of the plate, which latter isyieldingly backed by the anvil-body 2. The operation of subjecting theplunger to pressure may, however, be carried out by the use of ascrewpress, as before described.

It will thus be seen that my invention provides a simple and effectiveswaging device Which may be inexpensively manufactured and in which theplunger may be supported for the convenient application of the die andplate and that the construction employed re duces the number of partscustomarily used and materially simplifies the operation of swaging.

It will of course be understood; that the construction may be varied inthe details noted and in the form and proportionsof the parts to betterrender the device adaptable for use in swaging plates, cusps, and othersimilar dental elements.

The anvil-body or work-baclging 2 may and preferably is made of aplastic composition of clay and glycerin, and in connection therewiththin sheets of rubber may be used between the plate and die and backingto. prevent direct contact between the plate and backing and keep theparts clean. This form of backing will maintain its plasticity andconsistency, and by its use I am enabled to swage a plate on a plastermodel without damage to the latter.

Having thus described the invention, What I claim is 1. A dental swagingdevice comprising a cup having an anvil or work-backing therein,

a reversible plunger adapted to be seated at either end Within the cupand provided at one end with a Wear-ring forming a recess, and a plasticdie-backingseated in the recess.

2. In a dental swaging device, a plunger comprising a body formed ofwood and having countersunk reinforcingebands at its end,

one of said bands projecting tov form a shallow recess or receptacle fora die-backing.

3. A dental swaging. device comprising a cup having a worleba ckingtherein, and a plunger adapted to be supported in normal or invertedposition within the cup, said plunger comprising a body annularlygrooved at each end, wear-rings countersunk in said grooves and lyingflush with the outer surface of the body, one of said rings extendingbeyond the adjacent end of the bodyto form a shallow chamber or recess,and a die-backing seated in said chamber. or recess, substantially asdescribed. I

4:. In a dental swaging device, a plunger having a countersunk bandprojecting therefrom to form a recess for. a die-backing.

5. In a dental swaging device, a plunger comprising a wooden body havinga wearband or ring countersunk therein at one end, said ring projectingto form a recess orreceptacle for a die-backing.

In testimony whereof I afiiX mysignature in presence of two witnesses.

GEORGE J. Witnesses:

C. S.- HAAG, J. L. GINTZEL.

